Moria gives it 4 out of 5 stars and calls it "a rewarding film". Slant Magazine gives it 3 out of 4 stars. Senses of Cinema has a long article and doesn't like it. EW gives it a C- and says, "once you get past the images you realize that what's beneath the rotoscoping is a bleary-eyed talkfest of psychotic sci-fi gloom." DVD Talk says,
You want for more of a revelation at the climax, rather that the slow dawning of realization that as an allegory, A Scanner Darkly is a bit on the thin side.Rotten Tomatoes gives it a score of 69%.